碳纤维布包裹改善锈蚀钢筋混凝土柱延性试验研究  

Experimental research on ductile behavior of corroded reinforced concrete column confined with CFRP

作　　者：李金波[1] 贡金鑫[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2010年第2期220-227,共8页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(重点项目90815027)

摘　　要：研究了碳纤维布包裹对锈蚀钢筋混凝土柱抗震性能的影响.对不同锈蚀程度的试件在不同轴压比下进行了低周反复试验.研究表明,碳纤维布加固锈蚀试件是一种非常有效的技术,碳纤维布的约束作用,避免了剪切裂缝的产生,改善了试件的延性,使试件因锈蚀可能出现的脆性破坏重新转化为塑性破坏,试件的滞回性能明显提高,抗震性能显著改善.An experimental study was conducted on corroded reinforced concrete （RC） columns confined with carbon fiber-reinforced plastic （CFRP） composites to evaluate their seismic-resistance behavior. The low cyclic horizontal loading test was carried out using RC columns damaged by different degrees of rebar corrosion and strengthened with CFRP under different degrees of axial load. The experimental results show that retrofit technique of shear strengthening using CFRP is very effective and prevents shear cracks from growing and improves the ductility of RC columns with corroded rebars,and the failure of corroded specimen may become plastic from brittle due to the confining effect of CFRP,the hysteretic characteristic is enhanced obviously and the seismic-resistance behavior improved considerably.

关 键 词：钢筋混凝土 锈蚀 加固 抗震 CFRP 

分 类 号：TU375.3[建筑科学—结构工程]